The check box for “fun to drive” is always at the top of my runabout evaluation list, and we marked it with an exclamation point after putting the new 2016 Crownline 225 SS through its paces. Credit the Crownline F.A.S.T. Tab hull for extra smiles per gallon. The acronym stands for fin-assisted safe turn. That’s the description. In practice, a F.A.S.T Tab hull’s vented chines aerate the running surface to reduce drag, and the finlike tabs keep those vents from producing handling quirks. The hull sticks in turns, is responsive to trim, and really airs out at speed. Chop back the throttle and you can feel the vents working as the boat glides along for quite some distance before settling off plane.